Which name would be the most fitting for my character

I have a female character and I'm trying to decide on the perfect name for her. I have a few name ideas that I'm considering but I'm having problems deciding which name would be the most fitting.

This character is female, she finds out on accident that her real father is a very wealthy and prominent businessman in the area, she has a half sister named Ava, this character is also in a relationship with a guy named Ethan. I want her name to fit well with her half sister's name (which is Ava), and I also want her name to flow well and sound cute with her boyfriend's name.

Calista and Ava isn't ideal because of the same endings but I like that they don't sound like a planned sibset and more like they ended up as an accidental pairing. Plus, if she goes by Callie most of the time then Callie and Ava and Callie and Ethan are perfect.

“I read books when I was a kid, lots of books. Books always seemed like magic to me. They took you to the most amazing places. When I got older, I realized I couldn't find books that took me to all the places I wanted to go. To go to those places, I had to write some books myself.”
― Pat Murphy, The Wild Girls

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― J. Michael Straczynski